BIOLOGY
JAMB 2003 - Question 28
Biology 2003 JAMB Past Questions - Question 28: The response of plants to external stimuli in a non-directional manner is known as
Choose the most appropriate option for the gap .
A:
B:
C:
D:
Correct Answer
D
Explanation
Nastic movement is a non-directional movement made by a plant part in response to diffuse externa! stimulus e.g. the closing of the leaflets of flamboyant tree due to low light intensity. Phototropism is a directional movement made by part of plant to unilateral stimulus of light. Geotropism is a directional movement made by part of plant in response to the force of gravity. Tactic movement is directional movement made by the whole organism in response to a unilateral stimulus
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